Glass-tile mold.



APPLICATION FILED SEPTl 14,1907.

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JOHN S. LUKASKO, OF WESTON, WEST VIRGINIA.

GLASS-TILE MOLD.

Application filed September 14, 1907.

Specification of Letters Patent.

Patented April 6, 1909.

Serial No. 392,924.

To all whom it may concern:

Be it known that l, Jol-IN S. LUxAsKo, a resident of llfeston, in the county of Lewis and State of lll/lest Virginia, have invented certain new and useful improvements in Glass-Tile Molds, of which the following is a specification.

rlhis invention relates to apparatus for forming glass tiles, and the primary object is to provide e 'lnold which Will produce tiles with -finished edges, thus doing away with grinding and finishing the latter Which is the present usual practice.

A further Objectis to provide improved means for forining securing ribs on the hack of the tile; and further, to arrange the ribforining grooves in the inold in such a 'inanner as to provide outlets for the surplus glass during the pressing operation.

ln the accompanying' drawings, Figure l is a longitudinal sectional view of the mold and plunger, and Fig. 2 is a top plan view of the mold, showing a pressed tile in position therein. Fig. 3 is a view similar to Fig. l, With the plunger and niold separated and with the tile raised frein the mold. Fig. 4 is a cross-sectional view With the parts in the relation shown in Fig. 3, the tile being shown in the mold in full lines and raised in dotted lines.

Referring to the drawings, 2 designa tes the plunger-head carried hysteni 3 of any suitable forni of pressing apparatus. The head is preferably rect-angular in shape, and depending from the bottomthereof is riin 4- which incloses forming cavity 5. This cavity is the exact shape of the tile to he pressed.

The inold 6 is depressed on its top face at T to eover forming cavity 5 when the plunger is seated, the riin 8 on three sides of the mold inelosing the plunger rini as shown. The

latter may be formed With shoulder 9 to overi han@ inold riin 8. Mold face 7 is extended or enlarged at one side or end, as indicated at 7.

l0 are parallel rib-forming grooves in face or bottoni 7 which extend over enlargement 7, as indicated at 10, the grooves tapering inwardly and disposed in plane oblique to face 7.

In operation, the approximate amount of molten glass to forin a tile is placed in the lnold and the plunger lowered, filling cavity 5 and grooves l0, and forming the tile body A and rihs B on the hack or bottoni face thereof by which the tile is secured to a Wall or other surface. The excess glass A is forced out through groove-extensions l0. Side 4 of the plunger-rim, traversing the open portions of grooves lO, is tapered downwardly and so indents and scores the glass on a line dividing the tile body and the overflow glass il/ that after the tile is removed the verflow nay be readily cracked o'fl" Without inarring the outer face or edge of the tile, said surfaces 'seing given their 'finished forni by the pressing operation so that it is unnecessary to grind or sinooth thein. After the tile has been pressed the lifting of the plunger tends to start it from the mold, the tile having slight .lateral or side movement as it rises to free the ribs freni the grooves. The tile is not Wholly removed by the plunger, hut is so started that it may be readily lifted out.

vWhile the press is here shown constructed to forni only one tile at a time, the invention is not thus restricted, and other variations inay he had Without departing from the scope of 'the appended claims.

l claini:

l. in tile pressing apparatus, a niold having a laterally open plunger depression, the depression having bottoni hearing surface for the plunger uith rib-forming grooves depressed in said surface, and a plunger fitting the depression and hearing on the hottoln thereof, the bottoni. of the plunger recessed upwardly u ith the recess conforming to the outline and thickness of the tile body.

2. A tile press consisting of a plunger and a mold, one of said parts having a depression corresponding in outline to the tile to he pressed, and the other part having a face to cover said depression u ith riti-forming grooves in said face extending beyond the depression to receive the excess glass during the pressing operation.

3. A tile press consisting of a plunger having a depression in its pressing face corresponding in outline to the tile to he pressed, and a mold having rib-forming depressions extending Toeyond the cavity of the plunger.

A tile press consisting of a plunger having a depression in its pressing face corresponding in outline to the tile to he pressed, and a inold having its plunger-receiving face larger than the plunger cavity with rib-forniing grooves in said face extending heyond the plunger cavity when the plunger is in the mold.

5. A tile press consisting of a plunger having a depression in its pressing' face corresponding in outline to the tile to be pressed, and a niold having its top face depressed to receive the plunger with the depression,

larger at one side than the plunger, the bottorn of the mold-depression having rib-forlnf receives the tapered portion of the rirn, the

inold bottom having rib-forming grooves eX- tendng over the larger portion of the niold.

7. A tile press consisting of a plunger and Inold, one of said parts having a depression corresponding in outline to the tile to be pressed, and the other part having a face to cover the depression vv ith rib-forming grooves in the face disposed at an angle oblique to said face.

8. A tile press consisting of a plunger having a tile forming depression in its pressing face, and a mold having rib-forming grooves in its bottoni disposed at an angle oblique to the plane of the mold bottoni.

9. A. tile press consisting of a plunger having a tile forming depression in its pressing face, and a plunger-receiving mold having a series of parallel ribeforrning grooves in the bottom thereof tapered inwardly and disposed obliquely to the plane of the rnold botf toin.

10. ln the manufacture of glass tiles, a inold and a plunger, one of said parts being formed v ith open rib-niolding grooves, the

grooves being open for the discharge of niol- L ten glass in excess of that required for niolding the tile body and ribs. V

l1. ln the manufacture of glass tiles, a mold and a plunger, one of said parts formed With open-end rib-molding grooves, the open .f

groove ends forming an outlet for excess glass.

l2. in the manufacture of glass tiles, a niold having rib-forming grooves depressed therein, the grooves having open ends for the so discharge of excess glass, and a plunger.

13. ln the manufacture of glass tiles, a niold and a plunger, one of said parts having a depression corresponding in outline to the tile to be pressed, and the other part having rib-rnolding grooves formed therein with the grooves open at the ends for the discharge of excess glass. v

ln testimony whereof a'liiX iny signature in presence of tivo Witnesses.

JOHN S. LUKASKO. TWitnesses:

J. M. NEsBrr, ALEX. S. MABON.

UJI 

